>> the nickname is pippa, so i share my name with pippa middleton who, obviously, is kate's sister. jenna: i think we've all heard pippa, but i appreciate you sharing that with us. we were chatting earlier, and i noticed you're a little hoarse. one of the stories we want to talk about today is these winter colds that are coming on. you can misdiagnose them, you know, as yourself, misdiagnose what a cold can be as an allergy. >> that's right. jenna: how do we know the difference between a winter allergy and a winter cold? >> well, they can share symptoms in common, to runny nose, watering eyes, stuffy nose you can get with pote. but if you have a common cold, often you have a sore throat, aching in the muscles. with an allergy you up have itchy eyes, you may have a skin rash particularly if you're asthmatic, you may have a little bit of shortness of of breath and wheeze siness. jenna: so just if your sneezing and not feeling great, is there any way to check that before you just pop a, you know, a cold advil or something like that? well, if you have a common cold, you want to avoid an